Alert archive / Texas / Mesoscale Discussions in 2023

Mesoscale Discussion 784

May 13, 202314 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2023, 1:02 AM CDT for 14 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 13, 2023, 1:02 AM CDT (06:02 UTC)
Expired: May 13, 2023, 2:00 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 220

Counties Atascosa County, TX, Bastrop County, TX, Bexar County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Lavaca County, TX, Travis County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 50 km from the middle of the area, began a volume at 06:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 6.0 hours before the alert went out and 180 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3404 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 7:32 PM CDT	Mesoscale Discussion	SPC	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 7 more	88 min
May 12, 7:53 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 11 more	6 hr
May 12, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	Comanche, Cooke, Eastland, Erath, Hood, Jack and 7 more	5 hr
May 12, 8:37 PM CDT	Mesoscale Discussion	SPC	Callahan, Clay, Coleman, Eastland, Jack, Montague and 5 more	113 min
May 12, 10:37 PM CDT	Mesoscale Discussion	SPC	Brooks, Hidalgo, Jim Hogg, Starr	83 min

Nearby

Mesoscale Discussions in Texas, 2023 Every mesoscale discussion in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.